Aurora • Auroras are natural light displays in the sky. • In northern latitudes, it is called Aurora Borealis. • In southern latitudes, it is called Aurora Australis. • Auroras are commonly visible between 65 to 72 degrees north and south latitudes.
The Aurora Borealis • A magnificent aurora display in October 2001 in the Northern Latitudes.
The Aurora Australis • The magical Southern lights of aurora australis captured at 24 November 2001 at Wellington, New Zealand.
Auroral Mechanism • The sun emits a continuous stream of charged particles called the solar wind. • This wind interacts with the magnetic field of the earth by constantly bombarding it. • The solar wind collides with the atoms and molecules in the upper atmosphere. • The collision between the solar wind and the earth’s magnetic field ionize the atoms and molecules, releasing light.
Auroral Mechanism • Here is the solar wind colliding with the magnetosphere of the Earth.
Aurora at Lower Latitudes • The plasma accumulates within the magnetosphere, forming plasma sheet. • The stronger the solar wind, the larger and closer to the Earth the plasma sheet and the stronger the geomagnetic storm in the magnetosphere. • As a result of the stronger storm, Aurora can also be seen at lower latitudes.
Aurora at Lower Latitudes • This Aurora is over a point on Earth located at 50.6 degrees north latitude and 15.1 degrees east longitude.
Origin of Aurora • The origin of Aurora is the upper atmosphere of the Earth. • The origin of Aurora is 93 million miles (143 million kilometers) from the Earth. • The Aurora Polaris have roughly a radius limit of 2500 miles from their respective magnetic poles. • The location of aurora can move 500 km in less than a minute during magnetic storms.
Origin of Aurora • Filaments of the aurora in 2002 July 2. The filaments and their equal distances from each other show the electric origin similar to red sprites. No branches are there.